CN210483825U

CN210483825U - Vacuum sealing oil baffle

Info

Publication number: CN210483825U
Application number: CN201920433906.0U
Authority: CN
Inventors: 曾庆猛; 温淑媛
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2020-05-08
Anticipated expiration: 2029-04-02

Abstract

The utility model relates to a vacuum seal oil keeps off belongs to the equipment field for the steam turbine. The utility model discloses including the oil fender body, oil fender body suit has the clearance in the outside of pivot, and has between oil fender body and the pivot, and the inside that the oil kept off the body is provided with annular cavity, and the outer wall that the oil kept off the body is provided with extraction opening and No. two extraction openings, and annular cavity and an extraction opening and No. two extraction openings intercommunication are provided with oil fender tooth on the oil fender body, and oil fender tooth is located the clearance between oil fender body and the pivot, and oil fender tooth and pivot contactless. When the device is used, the external fan exhausts air outwards through the air exhaust port, so that the annular chamber keeps micro negative pressure. The oil blocking teeth on one side of the oil blocking body prevent lubricating oil from leaking outwards, the oil blocking teeth on the other side prevent steam from entering, a small amount of lubricating oil and steam leak to the middle of the oil blocking body, and the lubricating oil and the steam can be pumped to the outside from the annular cavity, so that the good effect of preventing the oil in the bearing box from leaking outwards and preventing foreign matters or steam from entering the bearing box is achieved, and the practicability is high.

Description

Vacuum sealing oil baffle

Technical Field

The utility model belongs to the equipment field for the steam turbine relates to a vacuum seal oil keeps off.

Background

The steam turbine oil shield is installed on the bearing frame motionless round, and the oil shield has the oil shield body, and there is the hole in the middle of the oil shield body, and the interior circumference in hole has annular oil to keep off the tooth, has certain clearance between annular oil fender tooth and the steam turbine pivot, and the oil shield is used for preventing the leakage of lubricating oil and preventing that outside foreign matter or steam etc. from getting into the inside pollution lubricating oil of bearing. After the oil shield is arranged at the end part of the bearing box of the steam turbine, a gap of 0.3-0.9 mm is required between the annular tooth tip of the oil shield tooth and the rotating shaft of the steam turbine, and if the installation gap is too small, the rotating shaft and the oil shield tooth are easy to rub against each other, so that the safe operation of a unit is influenced. If the clearance is bigger, the leakage of lubricating oil is possibly caused, when the bearing box of the steam turbine works, the inside of the bearing box is negative pressure, and external foreign matters or steam are easily sucked into the bearing box, thereby influencing the oil quality and reducing the performance of the lubricating oil.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a reasonable, the good vacuum seal oil catch of result of use of structural design.

The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a vacuum seal oil baffle, includes the oil baffle body, oil baffle body suit has the clearance in the outside of pivot, and has between oil baffle body and the pivot, its characterized in that, the inside of oil baffle body is provided with annular chamber, the outer wall of oil baffle body is provided with extraction opening and No. two extraction openings, annular chamber and extraction opening and No. two extraction openings intercommunication, be provided with the oil on the oil baffle body and keep off the tooth, the oil keeps off the tooth and is located the clearance between oil baffle body and the pivot, and the oil keeps off tooth and pivot contactless.

Preferably, the first air exhaust port and the second air exhaust port are symmetrically arranged.

Preferably, the annular chamber is located in the middle of the oil dam.

Preferably, the first air exhaust port and the second air exhaust port are both connected with the fan.

Preferably, the oil blocking teeth are made of self-lubricating composite materials.

Compared with the prior art, the utility model, have following advantage and effect: and the micro negative pressure of the annular chamber in the oil baffle is kept under the suction action of an external fan. The oil blocking teeth on one side prevent lubricating oil from leaking, the oil blocking teeth on the other side prevent steam from entering, a small amount of lubricating oil and steam leak to the gap between the oil blocking teeth and the rotating shaft, and can be pumped to the outside from the annular chamber, so that the lubricating oil is prevented from leaking and the steam enters the bearing box, and the good effect of preventing the oil in the bearing box from leaking and preventing foreign matters or steam outside from entering the bearing box is achieved.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure: the oil baffle body 1, the first pumping hole 21, the second pumping hole 22, the annular chamber 3, the oil baffle teeth 4 and the rotating shaft 5.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Examples are given.

Referring to fig. 1, the vacuum sealing oil baffle in this embodiment includes an oil baffle body 1, the oil baffle body 1 is sleeved outside a rotating shaft 5, a gap is formed between the oil baffle body 1 and the rotating shaft 5, an annular chamber 3 is disposed inside the oil baffle body 1, and the annular chamber 3 is located in the middle of the oil baffle body 1. The outer wall of the oil baffle body 1 is provided with a first air extraction opening 21 and a second air extraction opening 22, and the first air extraction opening 21 and the second air extraction opening 22 are symmetrically arranged. Annular chamber 3 and extraction opening 21 and No. two extraction openings 22 intercommunication, and extraction opening 21 and No. two extraction openings 22 all are connected with outside fan. The oil baffle body 1 is provided with oil baffle teeth 4, the oil baffle teeth 4 are positioned in a gap between the oil baffle body 1 and the rotating shaft 5, and the oil baffle teeth 4 are not in contact with the rotating shaft 5.

In this embodiment, the oil retaining teeth 4 are made of a self-lubricating composite material, and are wear-resistant and not easy to damage the rotating shaft. In order to obtain more uniform micro negative pressure, an air exhaust port can be increased.

The using process is as follows:

because the annular chamber 3 is arranged in the oil baffle 1, the external fan exhausts air outwards through the first air exhaust port 21 and the second air exhaust port 22, so that the annular chamber 3 keeps micro negative pressure. The oil baffle teeth 4 on one side of the oil baffle body 1 prevent lubricating oil from leaking, the oil baffle teeth 4 on the other side prevent steam from entering, and a small amount of lubricating oil and steam leak to the middle of the oil baffle and can be pumped to the outside from the annular chamber 3, so that the lubricating oil is prevented from leaking and the steam enters the bearing box.

And will be apparent to those skilled in the art from the foregoing description.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a vacuum seal oil baffle, includes oil baffle body (1), oil baffle body (1) suit is in the outside of pivot (5), and has the clearance between oil baffle body (1) and pivot (5), its characterized in that, the inside of oil baffle body (1) is provided with annular chamber (3), the outer wall of oil baffle body (1) is provided with extraction opening (21) and No. two extraction openings (22), annular chamber (3) and extraction opening (21) and No. two extraction openings (22) intercommunication, be provided with oil baffle tooth (4) on the oil baffle body (1), oil baffle tooth (4) are located the clearance between oil baffle body (1) and pivot (5), and oil baffle tooth (4) and pivot (5) contactless.

2. The vacuum sealing oil baffle according to claim 1, characterized in that the first pumping port (21) and the second pumping port (22) are symmetrically arranged.

3. Vacuum sealing oil dam according to claim 1, characterized in that the annular chamber (3) is located in the middle of the oil dam (1).

4. The vacuum sealing oil baffle as claimed in claim 1, wherein the first air extraction opening (21) and the second air extraction opening (22) are both connected with a fan.

5. The vacuum sealing oil baffle according to claim 1, characterized in that the material of the oil baffle teeth (4) is a self-lubricating composite material.